Anet A8 direct drive replacement/extension carriage (MK8 extruder compatible)

This carriage is designed to:

• Replace the original carriage by providing a maximum of compatibility with original parts (you only have to replace the fan duct, all the other original parts can be used)
• Provide similar positioning of the nozzle, so you not even have to change the firmware when coming from the original A8
• Provide ab platform for any direct drive design you want to put on your Anet A8

And the reason I did it:

• Provide the possibility to use upgraded extruder designs like the MK8 (https://www.amazon.de/Geeetech-MK8-Extruder-f%C3%BCr-Prusa-I3-3D-Drucker/dp/B06X9KNXZC/ref=sr_1_10?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&keywords=extruder&qid=1554543845&s=gateway&sr=8-10) in da direct drive setup on the Anet A8 (on the original carriage you are not able to use a design with a lever you you had to cut the carriage which took away the bracket for the fan.

Tested Upgrades which are compatible with the carriage:

• improved linear chain to Extruder on Anet A8 (https://www.thingiverse.com/thing:1905344)
• Anet A8 X Belt holder and tensionner (https://www.thingiverse.com/thing:2425783)
• Anet A8 bed level holder (12mm inductive sensor) (http://www.thingiverse.com/thing:1884118)

Additional parts needed:

Chain fan interface:

• 2 pcs. M4x10 screws

Fan bracket:

• 2 pcs. M3x20 screws
• 2 pcs. M3 nuts

Fan:

• 2 pcs. M4x25 screws
• 2 pcs. M4 nuts
• 2-4 pcs. M4 washers

Print Settings

Printer Brand:

Anet

Printer:

A8

Rafts:

Yes

Supports:

No

Resolution:

0,15 (duct) 0,25 (other parts)

Infill:

30

Filament: Sunlu PETG

blue How I Designed This ===================

freeCAD Tinkercad

as always the model is included

Since the fan duct was tricky and unable to convert to solid, I used Tinkercad for this job.